is to make sure that people live healthier lives but also combat the costs of the health care in the united states. and we know that preventable disease is the number-one cost driver. if we can beat childhood obesity, create healthier adults, that will lower costs for everything. ♪ >> you know, we gently know to exercise and to take care of our diet. sometimes the technology can help, as well. as you saw there. >>> still ahead, a former emergency room physician is now warning us to slow down. that's his warning. seems like we're all plugged in 24/7. he's going to make the case for going full throttle. but doing it 24/6. hey! did you know that honey nut cheerios has oats that can help lower cholesterol? and it tastes good? sure does! wow. it's the honey, it makes it taste so... well, would you look at the time... what's the rush? be happy. be healthy. >>> imagine a 15-year-old girl being told by her doctor she might not even live another week because of something she was doing to her own body. chelsea roff was that girl, and she was slowly killing herself. but the old adage applies here. w